package com.kaifamiao.N0821;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

public class Node2 {

    public static void main(String[] args) {

        List list = Collections.EMPTY_LIST;

        System.out.println(list.size());
        System.out.println(list.isEmpty());

        List<Integer> list1 = new ArrayList<>();

    }
}
